diff --git a/codex/stores/cachestore.nim b/codex/stores/cachestore.nim
index 404fbbcb..c2c7001c 100644
--- a/codex/stores/cachestore.nim
+++ b/codex/stores/cachestore.nim
@@ -27,6 +27,7 @@ import ../errors
 import ../manifest
 import ../merkletree
 import ../utils
+import ../clock
 
 export blockstore
 
@@ -219,6 +220,16 @@ method putBlockCidAndProof*(
   self.cidAndProofCache[(treeCid, index)] = (blockCid, proof)
   success()
 
+method ensureExpiry*(
+    self: CacheStore,
+    cid: Cid,
+    expiry: SecondsSince1970
+): Future[?!void] {.async.} =
+  ## Updates block's assosicated TTL in store - not applicable for CacheStore
+  ##
+
+  discard # CacheStore does not have notion of TTL
+
 method delBlock*(self: CacheStore, cid: Cid): Future[?!void] {.async.} =
   ## Delete a block from the blockstore
   ##
@@ -239,7 +250,7 @@ method delBlock*(self: CacheStore, treeCid: Cid, index: Natural): Future[?!void]
 
   if removed =? maybeRemoved:
     return await self.delBlock(removed[0])
-  
+
   return success()
 
 method close*(self: CacheStore): Future[void] {.async.} =
diff --git a/codex/stores/networkstore.nim b/codex/stores/networkstore.nim
index c5e0d208..16e72b21 100644
--- a/codex/stores/networkstore.nim
+++ b/codex/stores/networkstore.nim
@@ -20,6 +20,7 @@ import pkg/libp2p
 import ../blocktype
 import ../utils/asyncheapqueue
 import ../utils/asynciter
+import ../clock
 
 import ./blockstore
 import ../blockexchange
@@ -91,6 +92,27 @@ method putBlockCidAndProof*(
 ): Future[?!void] =
   self.localStore.putBlockCidAndProof(treeCid, index, blockCid, proof)
 
+method ensureExpiry*(
+    self: NetworkStore,
+    cid: Cid,
+    expiry: SecondsSince1970
+): Future[?!void] {.async.} =
+  ## Ensure that block's assosicated expiry is at least given timestamp
+  ## If the current expiry is lower then it is updated to the given one, otherwise it is left intact
+  ##
+
+  if (await self.localStore.hasBlock(cid)).tryGet:
+    return await self.localStore.ensureExpiry(cid, expiry)
+  else:
+    trace "Updating expiry - block not in local store", cid
+
+  return success()
+
+method listBlocks*(
+  self: NetworkStore,
+  blockType = BlockType.Manifest): Future[?!AsyncIter[?Cid]] =
+  self.localStore.listBlocks(blockType)
+
 method delBlock*(self: NetworkStore, cid: Cid): Future[?!void] =
   ## Delete a block from the blockstore
   ##